When this tool is useful
Reducing large photographic PNGs for modern web delivery after alpha and quality checks.
How local processing works
The browser decodes PNG to RGBA pixels and AVIF-encodes them locally with the selected quality.
How to use it
- Prepare Convert PNG to AVIF: Work from a copy and confirm quality, transparency, flat-color edges, dimensions, target support, fallback, memory, and output bytes. Keep the source unchanged.
- Apply Convert PNG to AVIF: Process locally in the browser. The browser decodes PNG to RGBA pixels and AVIF-encodes them locally with the selected quality.
- Download and verify: Save under a new name. Inspect transparent edges over light and dark backgrounds, compare text at 200%, test target browsers, and measure savings.
Important limitations
Lossy settings can damage text, logos, and alpha edges; metadata may be removed, encoding is expensive, and support requires testing.
Verify the downloaded result
Inspect transparent edges over light and dark backgrounds, compare text at 200%, test target browsers, and measure savings.
Private by design
Your files stay in this browser. The tool does not upload the source or output to our servers.
Questions and answers
When should I use Convert PNG to AVIF?
Reducing large photographic PNGs for modern web delivery after alpha and quality checks.
What does Convert PNG to AVIF change?
The browser decodes PNG to RGBA pixels and AVIF-encodes them locally with the selected quality.
Which limits and settings matter?
quality, transparency, flat-color edges, dimensions, target support, fallback, memory, and output bytes. Lossy settings can damage text, logos, and alpha edges; metadata may be removed, encoding is expensive, and support requires testing.
How do I verify the result?
Inspect transparent edges over light and dark backgrounds, compare text at 200%, test target browsers, and measure savings.